Remove `_Pods.xcodeproj` to allow `swift package-registry publish` command to succeed

[albertodebortoli]

Brief Summary of Changes

What does this PR address?

• [x] GitHub issue (Add reference - #445)
• [ ] Refactoring
• [ ] New feature
• [ ] Bug fix
• [ ] Adds more tests

Are tests included?

• [ ] Yes
• [x] No // No new tests are needed for this change

Reviewer, please note:

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I ran the full test suite before pushing the changes and all the tests pass. -> This should be guaranteed by the CI pipelines on this repo anyway.

[albertodebortoli]

Hello! Gentle ping.

[tommyg-cld]

@albertodebortoli it's in our backlog but no ETA. We will keep you posted.

[albertodebortoli]

👋 just pinging here this since all the changes needed are already provided in this PR so it should be a simple merge. We updated to 5.2.4 recently and we bumped into the problem again.

[atdcloud]

@adimiz1 ^